. >> reporter: 21-year-old naser abdo didn't want to fight in afghanistan but sources say he was more than willing to cause bloodshed at home. after being arrested he told officers he "wanted to get even with the military" military and chose ft. hood because of the 2009 attack where major nadal hasan allegedly killed 13 and wounded 30. he told them his plan was to set off two bombs then shoot any survivors. police say the attack was imminent. >> we would probably be here today giving you a different briefing had he not been stopped. >> reporter: greg ebert is the man would stopped him. a former marine and police officer who works at this killeen gun store. he got suspicious when abdo arrived in a cab on tuesday then bought six pounds of gunpowder, three boxes of shotgun ammunition and a magazine for a semiautomatic pistol. he paid $250 in cash. >> if somebody comes in, especially into a business like this, and makes a purchase and doesn't know what he's buying, i'd be concerned about that. >> reporter: concerned enough to call police, who the next day searched the soldier's room at th